1872.] MR. A. SANDERS ON LIOLEPIS BELLI. 167 



from rather more than one fourth of the anterior and lower part of 

 the inner surface of the suprascapula. The second section arises 

 from nearly four fifths of the inner surface of the coracoid ; its fibres 

 converge, and end in a short flat tendon which is joined by the ten- 

 don of the first section, the whole being inserted into the internal 

 edge of the head of the humerus and into the capsular ligament of 

 the shoulder-joint. 



Pronator radii teres (figs. 1 & 6) arises from the internal condyle 

 of the humerus, proximad of the origin of the next muscle, and is 

 inserted into the anterior edge of the radius for rather more than 

 half its length. This muscle does not occur in Gecko. 



Flexor carpi radialis (figs. 1,2, & 6) arises from the inner condyle 

 of the humerus, distad of the last, in common with the flexor per- 

 forans, from which it is inseparable. At its origin below it is inserted 

 into that bone of the carpus to which the radial side of the annular 

 ligament is attached, and further sends a tendon to be inserted into 

 the anterior edge of the base of the first phalanx of the pollex. 



Flexor perforans digitorum (fig. 6) arises from the inner con- 

 dyle, in common with the last, and from the whole length of the 

 ulna. It divides into two sections : one joins the flexor carpi 

 ulnaris; the other, which is the larger of the two, developes a broad 

 tendon occupying the flexor surface of the wrist. Over the carpus 

 there is a sesamoid bone in its substance ; distallyit divides into five 

 tendons, one going to the last phalanx of each digit. From the deep 

 surface of the broad part of the tendon arises a muscular slip, which 

 is inserted into the carpus. On the superficial surface of the same 

 part are developed three muscular slips: the first joins the perforatus 

 tendon of the second digit on the radial side ; the second in like 

 manner joins the perforatus tendon of the third digit ; the third 

 joins the perforatus tendon of the fourth digit, all on the radial side; 

 the latter also joins the extra tendon which belongs to the perforatus 

 of the same digit. In addition there are three muscular slips which 

 arise from the deep surface of the tendon and are inserted each into 

 the base of the first phalanx of the second, third, and fourth digits 

 respectively. 



Flexor carpi ulnaris (figs. 6 & 8) arises by two heads, — one from 

 the posterior surface of the humerus immediately proximad of the 

 elbow-joint, but nearer the outer than the inner condyle ; the other 

 arises from the proximal extremity of the ulna. It occupies the 

 posterior border of the forearm, and, receiving a strong reinforcement 

 of fibres from the flexor perforans, it is inserted into the pisiform 

 bone of the carpus. 



Flexor perforatus digitorum (fig. 6) is wholly situated in the 

 palm. It is primarily divided into four slips, of which the third 

 is again divided into three, for the third and fourth digits ; the 

 whole arises from the annular ligament and pisiform bone. 

 The first slip, in addition to its common origin, also arises from the 

 whole length of the metacarpal bone of the pollex, and is inserted 

 into the base of the first phalanx of the same by a short and broad 

 tendon on each side, between which the tendon of the perforans passes. 



